Kourtney has a toned tush

Kourtney Kardashian is giving sister Kim some serious competition in the curvy bum stakes.

The petite star, 35, has been showing off her amazing bottom in a revealing high-cut swimsuit while on holiday with boyfriend Scott Disick, 30, in Las Vegas.

Kourtney was snapped flaunting her toned tush in an olive green one-piece as she emerged from a swimming pool during the vacation last week.

The mum-of-two wore her long hair in a sleek half-up style and sported a gold bangle on her wrist.

It was Kourtney‘s birthday on Friday and she’s certainly been celebrating in style.

After her mini-break with Scott, the TV star jetted off to Mexico with her man and their children Mason, 4, and Penelope, 21 months, for a family holiday.

SEE PICTURES Khloe Kardashian wears sexy black jumpsuit at Kardashian Kollection party without sisters Kim and Kourtney

SEE PICTURES Kourtney Kardashian and her family’s life in pictures

SEE PICTURES Khloe Kardashian‘s sister Kim‘s Style File: The TV star and her fashion looks

Anna Francis